Home / 356,711.50-489,140

Finding the Third Proportional to 356,711.50 and 489,140

Calculator

Solution

The third proportional to 356,711.50 and 489,140 is: 670,732.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    356,711.50 : 489,140 = 489,140 : x
  2. Step 2: Convert to fraction form
    356,711.50/489,140 = 489,140/x
  3. Step 3: Cross multiply
    356,711.50x = 489,140 × 489,140
  4. Step 4: Simplify right side
    356,711.50x = 239,257,939,600
  5. Step 5: Solve for x
    x = 239,257,939,600/356,711.50
  6. Step 6: Final answer
    x = 670,732.34

Related Problems

Find third proportional to 178,355.75 and 244,570
Half scale
Find third proportional to 713,423 and 978,280
Double scale
Find third proportional to 356,714 and 489,143
Similar ratio
Find third proportional to 535,067.25 and 733,710
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.